Malicious PDF — malware analysis report

Static analysis result for SHA-256 4008885093fedc0d…

MALICIOUS

PDF

90.9 KB Created: 2021-06-05 01:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2b37a22e1626b10740b6d5236e8b011d SHA-1: 5dce88fc6573baae0dae11d5d6f93468b5745019 SHA-256: 4008885093fedc0def547fa1bfc65a1f01843588ff5ad888648b6b096260328c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a site offering movie downloads, suggesting a lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for such links. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/pbw?utm_term=twilight+2008+full+movie+in+hindi+download+480p+worldfree4u PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421780/normal_5ff3a47bab4f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_5fd3bd90a3447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_602d3e35ce97e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5ff7f2b0ef2fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_605f9bd81930c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144632448/nubexafusal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0dc544-3b16-4a5d-a3a7-327143a660aa/rosopugidaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f4e491-78f7-451b-80a7-f4cc9b146243/26817083771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c511493f-320a-4428-ab43-e402552a7a83/listening_skills_in_the_workplace_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b451f930-66c1-4730-9d44-6a9d9b1568b1/tajweed_rules_in_english_youtube.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144425352/14446741417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9b5764-063b-4baa-a5a8-3527d5ff0d11/are_air_purifiers_safe_for_newborns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b1e208-e517-4ccd-820b-8e843d2997ba/why_is_my_fire_alarm_beeping_once_every_minute.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144466659/descargar_servidores_para_http_injector_telcel_2019.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144424428/kr_gopalakrishna_engineering_drawing_book_free_download.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144499608/how_to_reset_schlage_encode_keypad_lock.pdfIn PDF document text
    • http://jufugoxula.pbworks.com/f/there_will_come_soft_rains_summary_prezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c454ce0b-9065-475b-bf3f-7adf3bdd9b13/48461316347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf54508-0568-444a-84e6-af97338c88c8/dakarumulimivasuselexar.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/is_hoi4_multiplayer_fun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2314a4-d6a8-422b-893a-27a175fed100/jamatitoxirabiwa.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/36986744598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f516e80a-4eba-4cd1-b398-15cc5721b2f2/the_pilgrims_progress_movie_sequel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a47c4f-7b7f-444b-934c-0e8eeb7371d0/tejasosame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4269cd72-d96f-41a4-a893-f62ac5d20f39/daloxosavosuteg.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/solution_complete_zelda_majoras_mask_3ds.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 5816 bytes
SHA-256: fd4705877ad8d1e21014b4b2125414749b9aa0b4dd9196cce5a30fa989fac577
font_01_sfnt_off0001123b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 11560 bytes
SHA-256: 770172aa342bcdf873a03f2dbcae288282693d9b69350923f94c8c515fcb7a39
font_02_sfnt_off000139b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B9 16124 bytes
SHA-256: aca4cc7a4adecbe8d3b69816f606a775e78e0cb22b4b713e3bf6556a18461847
font_03_sfnt_off00014ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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